Preparation of two-dimensional yttrium iron garnet magnonic crystal on porous silicon substrate

In this article, we show theoretically and experimentally the formation of spin-waves band gaps in a magnonic crystal that was implemented by the deposition of periodic micro-structured strips of magnetite nanoparticles. A theoretical model describing the spectra of the transmitted spin-waves bandgaps is proposed. This is achieved using a simple model based on microwave transmission line theory and considering the presence of micro-structured strips of magnetite nanoparticles on the surface. Such magnonic crystal of equally spaced micro-structured strips of magnetite nanoparticles on the surface of an yttrium iron garnet thin film has been implemented and measured. The periodic micro-structured nanoparticles are deposited on the surface of such yttrium iron garnet single-crystal film grown on a gallium-gadolinium garnet substrate via dip-coating technique. Propagation of magnetostatic surface spin-waves is studied and it is shown that the presence of such periodic structure leads to the formation of spin-wave band gaps in the transmission characteristics. The spin-wave detection has been carried out using a pair of microwave antennas and a vector network analyzer. The results show that the periodic structure formed by the magnetite strips modifies the spectra of the transmitted spin waves producing band gaps.

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Metal thickness dependence on spin wave propagation in magnonic crystal using yttrium iron garnet

Journal of Applied Physics ◽

10.1063/1.4916815 ◽

2015 ◽

Vol 117 (17) ◽

pp. 17E510 ◽

Cited By ~ 12

Author(s):

Naoki Kanazawa ◽

Taichi Goto ◽

Jet Wei Hoong ◽

Altansargai Buyandalai ◽

Hiroyuki Takagi ◽

...

Keyword(s):

Wave Propagation ◽

Spin Wave ◽

Yttrium Iron Garnet ◽

Thickness Dependence ◽

Yttrium Iron ◽

Metal Thickness ◽

Magnonic Crystal ◽

Iron Garnet

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Synthesis and Characterization of High-Purity Yttrium-Iron-Garnet Nanowires Inside a Porous Silicon Membrane by the Sol–Gel Method

IEEE Magnetics Letters ◽

10.1109/lmag.2020.2981278 ◽

2020 ◽

Vol 11 ◽

pp. 1-4

Author(s):

Leili Hayati ◽

Ashkan Ghanbarzadeh ◽

Fabrizio Lombardi ◽

Carmine Vittoria

Keyword(s):

Porous Silicon ◽

High Purity ◽

Yttrium Iron Garnet ◽

Sol Gel ◽

Synthesis And Characterization ◽

Silicon Membrane ◽

Yttrium Iron ◽

Gel Method ◽

Iron Garnet

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Giant magnon spin conductivity approaching the two-dimensional transport regime in ultrathin yttrium iron garnet films

10.21203/rs.3.rs-1217468/v1 ◽

2022 ◽

Author(s):

Xiangyang Wei ◽

Obed Alves Santos ◽

Cristhian Humberto Sumba Lusero ◽

Gerrit Bauer ◽

Jamal Ben Youssef ◽

...

Keyword(s):

Quantum Wells ◽

Yttrium Iron Garnet ◽

Chemical Potential ◽

High Mobility ◽

Electronic Charge ◽

Two Dimensional ◽

Yttrium Iron ◽

Low Dissipation ◽

Iron Garnet ◽

Millikelvin Temperatures

Abstract Conductivities are key material parameters that govern various types of transport (electronic charge, spin, heat etc.) driven by thermodynamic forces. Magnons, the elementary excitations of the magnetic order, flow under the gradient of a magnon chemical potential in proportion to a magnon (spin) conductivity σm. The magnetic insulator yttrium iron garnet (YIG) is the material of choice for efficient magnon spin transport. Here we report an unexpected giant σm in record-thin YIG films with thicknesses down to 3.7 nm when the number of occupied two-dimensional (2D) subbands is reduced from a large number to a few, which corresponds to a transition from 3D to 2D magnon transport. We extract a 2D spin conductivity (≈1 S) at room temperature, comparable to the (electronic) spin conductivity of the high-mobility two-dimensional electron gas in GaAs quantum wells at millikelvin temperatures. Such high conductivities offer unique opportunities to develop low-dissipation magnon-based spintronic devices.

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